RPI-441C1 ROHM Semiconductor Switch (Other) In Stock
ROHM RPI-441C1 is a single-channel photo interrupter with a 4 mm slot gap, supporting 30 V collector-emitter breakdown voltage and 50 mA forward current, designed for reliable object detection and position sensing in through-hole configurations.
- Manufacturer
- ROHM Semiconductor
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- RPI-441C1 Datasheet PDF
- Category
- Switch
- Price
- From $0.2650(MOQ 1)
- Temp Range
- -25.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of RPI-441C1?
- 4 mm gap slot design enables reliable object detection without physical contact
- 30 V collector-emitter breakdown voltage supports robust switching circuit design
- Single-channel configuration simplifies circuit implementation for position sensing
- Through-hole mounting ensures mechanical stability in demanding environments
- Dark current maximum of 500 nA ensures accurate light-off state detection
What is RPI-441C1 used for?
The RPI-441C1 photo interrupter is widely used in industrial automation equipment such as conveyor belt position sensors, paper feed detectors in printers, and rotary encoder disk readers. Its 4 mm slot gap accommodates typical interrupter targets like encoder wheels and mechanical flags used in office machines and vending equipment. The component also serves in home appliances and consumer devices requiring non-contact position or speed detection.
What are the specifications of RPI-441C1?
| Pbfree Code | Yes |
| Factory Lead Time | 12Weeks |
| YTEOL | 7 |
| Coll-Emtr Bkdn Voltage-Min | 30V |
| Configuration | SINGLE |
| Dark Current-Max | 500nA |
| Forward Current-Max | 0.05A |
| Gap Size | 4mm |
| JESD-609 Code | e1 |
| Mounting Feature | THROUGH HOLE MOUNT |
| Number of Functions | 1 |
| On-State Voltage-Max | 30V |
| On-state Collector Current-Nom | 1mA |
| Optoelectronic Device Type | TRANSISTOR OUTPUT SLOTTED SWITCH |
| Output Circuit Type | Transistor |
| Slot Width-Nom | 4mm |
| Surface Mount | NO |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
Where can I find the RPI-441C1 datasheet?
RPI-441C1 Datasheet DownloadOfficial datasheet from ROHM Semiconductor
What are equivalent replacements for RPI-441C1?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 4 mm gap of the RPI-441C1 compare to competitors, and what target thicknesses can it detect?
The RPI-441C1 features a 4 mm slot gap, which is a standard size suitable for detecting objects and encoder wheels up to approximately 3 mm thick with adequate clearance. This gap size balances compact package dimensions with enough space to accommodate typical interrupter targets used in paper feed sensors, rotary encoders, and mechanical position flags in industrial and office equipment.
At what forward current should the RPI-441C1 LED be driven to achieve reliable triggering without exceeding its 50 mA rating?
The RPI-441C1 infrared LED is rated for a maximum forward current of 50 mA, but in most applications it is driven at 10 mA to 20 mA to balance detection sensitivity with LED lifetime. Operating at reduced current of 10 mA to 15 mA is typical in low-power designs, using a series resistor calculated from the supply voltage minus the LED forward voltage of approximately 1.2 V to 1.4 V.
In a printer paper-feed detection circuit, how does the RPI-441C1 dark current specification affect false-trigger prevention?
The RPI-441C1 specifies a maximum dark current of 500 nA from the phototransistor output when the beam is blocked, which is low enough to be interpreted as a logic LOW by standard CMOS comparator circuits with pull-up resistors in the 10 kΩ range. This low dark current ensures that the sensor reliably distinguishes between beam-interrupted and beam-clear states, preventing false paper-detection triggers in printer feed mechanisms.
What through-hole PCB footprint does the RPI-441C1 require, and how does its 4.2 mm height affect clearance planning?
The RPI-441C1 uses a through-hole package measuring 8 mm by 5.2 mm with a 4.2 mm body height above the PCB. Designers should allow at least 5 mm vertical clearance above the board for the component body, plus additional clearance for the 4 mm detection slot to be accessible to the passing target object. Standard 2.54 mm pin-pitch through-hole footprints are compatible with this package for most PCB layout tools.
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Why Buy from FindMyChip
About ROHM Semiconductor
ROHM Semiconductor is a leading electronic component manufacturer. FindMyChip sources ROHM Semiconductor ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.2600 | $3.26 |
| 399+ | $1.3448 | $536.58 |
| 500+ | $0.4830 | $241.50 |
| 1000+ | $0.2700 | $270.00 |
| 2000+ | $0.2650 | $530.00 |
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